Wave of invader swept across Western Europe<span> (Vikings, Franks, Goths, and Huns) trade slowed down to a trickle (people became more isolated) towns became empty, and classic learning just stopped.</span>
The answer is D. Farming settlements in the Indus Valley River began being established in 4000 BCE.
He made a rule saying if you do not work you do not eat. hope that helps
The impact of the printing press, astrolabe, and caravel on 16th-century Europe demonstrates the ability of technology to "<span>redefine human understanding of the world"</span>
